Discrete-time control of Maglev system using switched fuzzy controller

In this paper, the implementation of switched fuzzy controllers for Magnetic Levitation (Maglev) system which is a unstable nonlinear system is studied. The switched Parallel distributed compensator (switched-PDC) applied in the controller is a Takagi-Sugeno (T-S) fuzzy system control in a discrete form. It is a state feedback controller in which the gain switched is depending on the value of membership functions. This controller is exploited to stabilize the position of the ball in Maglev system in the existence of disturbances. So the proposed technique will guarantee the stability and performance of closed loop nonlinear system and ensure robustness to external disturbances. The simulation results for control of Maglev will compare the effect of the proposed technique with pure PDC to indicate that the switched-PDC will provide better results under external disturbances.